ARUP; ISBN: 978-0-9562121-5-3 - CMBBE 2012 - Cardiff University

B. Cutting planes
The surgeon defines the cutting planes located possibly close to the generated model of
tumor with appropriate margin of safety. The cutting planes can be adjusted using
translation and rotation options (see fig. 3).
C. Planning of bioimplant geometry
Fig. 3. Cutting planes
After planning of cutting the surgeon needs to design the geometry of bioimplant which
will reconstruct the bone loss. To define the proper geometry of bioimplant, which will
restore the proper shape and function, such as occlusion in case of mandible or maxilla
bones, the surgeon needs to apply so called mirroring method. The healthy part of bone
is reflected in the plane of face symmetry defined through three landmarks marked by
surgeon. The mirrored part can be adjusted to fit the bone loss appropriately.
Afterwards, the mirrored part is cut using the resection planes to obtain the geometry of
implant which fits the bone loss (see fig. 4).
Fig. 4. Mirroring and planning the geometry of bioimplant